Induction Oven Wall Heating with Magnetic Insulation
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Solution Overview
Problem
Conventional electric ovens rely on heating elements at the walls, which can pose safety risks and inefficiencies in heat distribution, and induction technology in cooking hobs is not integrated safely and efficiently into oven cavities.
Innovation Solution
The integration of induction heating means, comprising a magnetically insulating and electrically insulating layered structure with ferrite tiles and inductors, generates a magnetic field to heat the oven walls, ensuring user safety and efficient heat distribution while maintaining a conventional oven appearance and structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical resistance heating elements are used in oven walls, then heating function is achieved, but safety risks and inefficiencies in heat distribution occur
Solution Approach 1:
The patent replaces conventional electrical resistance heating elements with induction heating means that generate electromagnetic fields. This substitution eliminates direct contact between high-temperature elements and users, improving safety, while the electromagnetic fields enable more efficient and uniform heat distribution through the oven cavity.
Solution Approach 2:
The patent introduces electromagnetic fields as an intermediary between the power source and the food. The induction heating means generate electromagnetic fields that induce currents in the food or cookware, which then self-heat, reducing energy loss and improving distribution efficiency compared to direct wall heating.
2Productivity
If induction technology is integrated into oven cavity, then heating efficiency improves, but excessive heat transfer to exterior and safety concerns arise
Solution Approach 1:
The patent employs composite wall structures combining multiple materials with different thermal properties. The walls incorporate insulating materials and heat-resistant ceramics that allow efficient internal heating while blocking excessive heat transfer to the exterior, resolving the contradiction between heating efficiency and external heat exposure.
Solution Approach 2:
The patent applies different material properties to different parts of the oven structure. The inner cavity walls use materials optimized for heat retention and induction heating, while outer walls use insulating materials to prevent external heat transfer, creating localized quality variations that address both heating efficiency and safety.
3Ease of manufacture
If conventional heating elements are used, then construction is simple, but safety risks and heat distribution inefficiencies occur
Solution Approach 1:
The patent divides the oven wall structure into modular segments, each containing induction heating means and insulating materials. This segmentation allows for standardized manufacturing of safe, efficient heating modules that can be assembled into complete ovens, maintaining construction simplicity while improving safety.
4Productivity
If induction heating means are integrated into walls, then heating efficiency improves, but device complexity increases
Solution Approach 1:
The patent merges the induction heating means, insulating materials, and structural wall components into integrated assemblies. This merging reduces the number of separate parts and simplifies installation while maintaining the heating efficiency benefits of induction technology.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for safe, efficient, and flexible heating of the oven cavity, preventing excessive heat transfer to the exterior, ensuring user and cabinet safety, and enabling easy storage and maintenance, while maintaining the appearance and functionality of traditional ovens.
Implementation Method 1
heating means positioned at least one of the aforesaid walls of the casing, the heating means being induction heating means generating a magnetic field heating the walls of the oven
Implementation Method 2
induction heating means generating a magnetic field
Implementation Method 3
a magnetically insulating member positioned in that part of the structure most distant from the oven wall
Implementation Method 4
an electrically insulating member positioned between the induction heating means and the corresponding oven wall
Implementation Method 5
ensuring user safety and efficient heat distribution while preventing excessive heat transfer to the exterior
Data Source
AI summary
An electric oven includes a box casing presenting side walls, a rear wall, an upper wall and a lower wall, an opening and a closure door for this latter, the walls bounding an oven cavity heated by heating structure functionally associated with at least one of the walls. The heating structure is arranged to heat the cavity by induction and includes a generator arranged to generate an electromagnetic field, an electrically insulating material disposed between the generator and the oven wall at which the heating structure is positioned, and magnetically insulating structure is disposed on the outside of the oven with reference to the wall, the generator, the electrically insulating structure and the magnetically insulating structure defining a single, layered structure fitted to the oven wall.